Film holding device



NOV. l2, 1940. E B RlNARD ET AL 2,221,265

FILM HOLDING DEVICE Filed March 10, 1959 .AT TU PMN EYE;

Patented Nov. 12, 1940 UNITED STATES PATENT OFFICE FILM HOLDING DEVICEApplication March 10,

2 Claims,

to use, and one which may be manufactured at a minimum cost.

A further object is to produce a device of this character which will notinjure the lm during the processing thereof.

Other objects and advantages will be apparent during the course of thefollowing description.

In the accompanying drawing forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame,

Fig. 1 is a side elevation of our device having a portion thereof brokenaway;

Fig. 2 is a front elevation of Fig. 1;

Fig. 3 is a cross sectional view taken on the line 3 3 of Fig. 1; and

Fig. 4 is a fragmentary View, showing the winding stud and its ratchetin detail.

In the processing of a photographic film, the film must rst be subjectedto a developing agent and later to a fixing agent. As these agents areboth chemicals, it is apparent that all surfaces of the lm to beprocessed must be reached by these chemicals. As the lm is ofconsiderable length, it is apparent that the handling of the film is adelicate operation; and if the iilm is not carefully handled, thesensitive emulsion thereon will be injured.

We have, therefore, devised means for holding the film in spacedconvolutions and rigidly attaching the lm to a disc so that the samewill stand upon edge, so to speak.

In the accompanying drawing wherein for the purpose of illustration isshown a preferred embodiment of our invention, the numeral 5 designatesa base plate having standards I5 and 'I which serve to support a spindle8 and a crank arm 9. This spindle has threadedly secured thereto, as atII, a threaded winding stud I2, upon which is freely rotatably mounted adisc I3 having a spring-pressed dog I4, the spring being shown at I6,which engages the teeth of a ratchet Il, which is pinned or otherwisesecured to the winding stud I2. The winding stud I2 has a head I8 towhich one end of a coiled spring I9 is secured. The opposite end of thisspring 1939, Serial N0. 261,078

is secured at 2l to the disc I3 at a point near its outer periphery. Thehead I8 has a projection or pin 22 which serves to secure the end of thelm thereto.

In using our device, and assuming that the parts are in the position ofFig. 2, the operator secures one end of the film to the pin 22, usingone of the perforations usually found adjacent the edge of the film. Itis understood that the film magazine is held in one hand during thiswinding operation. Now by turning the crank 9 slowly in acounterclockwise direction (see Fig. 2) and guiding the film into placeon the spring I9, the result will be that by now holding the discstationary and while continuing to turn the crank, the spring I El willbe coiled upon itself, thus holding the convolutions of lm between itsconvolutions; and the ratchet I'l will prevent uncoiling of the springso that the lm cannot escape.

In order to remove the lrn and disc from the standard, the disc is stillheld and the direction of rotation of the crank 9 is reversed. This willunscrew the spindle 8 from its threaded connection II with the windingstud, thus permitting the disc and its assembled parts together with thefilm thereon to be removed, after which the same may be immersed in thedeveloping agents.

Upon the completion of the processing of the film, the disc and itsassembly are replaced in the position of Fig. 1. Then by holding thedisc stationary and by releasing the ratchet II, the spring may beallowed to unwind slowly, thus releasing the lm positioned thereon.

It will be apparent from the above description that our device. willaccomplish all the objects set forth.

It is to be understood that the form of our invention herewith shown anddescribed is to be taken as a preferred example of the same and thatvarious changes relative to the material, size, shape and arrangement ofparts may be resorted to without departing from the spirit of theinvention or the scope of the subjoined claims.

Having thus described our invention, We claim:

1. In a device of the character described, a disc having a studcentrally positioned therein and rotatable relative thereto, said studhaving a head extending beyond the face of said disc, a spring mountedon said disc and having one end connected to said head and having itsopposite end secured to said disc at a point near1 its periphery, meansfor rotating said stud in one direction so as to coil said spring uponitself, means carried by said disc to prevent retrograde movement ofsaid stud when said spring tends to uncoil, means for securing a film tosaid head, and means for supporting said stud during the placing of afilm between the convolutions of said spring.

2. A device for processing lms, comprising a support, a spring havingone end secured to said support, a rotary member mounted in the supportand rotatable with respect thereto and secured to the opposite end ofthe spring, means for securing the end of a film to said rotary member,and means for rotating the rotary member while the support is heldstationary, whereby the fllm may be wound between the convolutions ofthe spring and the rotation of the rotary member will wind the springand clamp the film between the convolutions thereof.

ELLIS BUDINGTON RINARD. WILLIAM S. WEEKS.

